<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <title>vertical-align</title>
    <style>
        body {
            font-family: "宋体";
        }

        div {
            margin: 100px auto;
            border: 1px solid #000;
            width: 400px;
            font-size: 20px;
            line-height: 50px;
            background-color: #f00;
        }

        strong  {
            display: inline-block;
            width: 50px;
            height: 50px;
            background-color: #0f0;
            margin-bottom: 20px;

            vertical-align: 100%;
        }

        div {
            animation-duration: 2s;
            animation-name: my-anim1;
            animation-iteration-count: infinite;
            animation-timing-function: ;
        }

        @keyframes my-anim1 {
            from {

            }

            to {

            }
        }

        @keyframes my-anim2 {
            0% {

            }

            20% {

            }

            60% {

            }

            100% {

            }
        }
    </style>
</head>
<body>

<div>
    Engxxxx
    <span>5435345</span>
</div>

</body>
</html>